The energy returned includes usable energy and not wastes such as heat.

After a few weeks his energy returned and he went back to work.

The slap of wet cloth hit her cheeks, and energy returned to her body.

Enough energy returned to my legs that I could stand.

In the morning, his fever had broken, his energy had returned.

Plants, in other words, represent energy returned to matter - entropy undone, at least here on earth.

This energy, which had been missing in recent games, returned in emphatic fashion.

His angrily humming energy reactor returned to its normal sound of operation.

But his color was normal; and the energy had returned.

Jim shouted, as if all the lost energy had suddenly returned.